fix(deps): remove deprecated husky commands

Husky 9.1 now warns when doing some rebase of patches:
husky - DEPRECATED

Please remove the following two lines from .husky/prepare-commit-msg:

#!/usr/bin/env sh
. "$(dirname -- "$0")/_/husky.sh"

They WILL FAIL in v10.0.0

Remove the deprecated lines.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I8b7fa82aa7b5e178554a1b4a650b2b1b8044092c
diff --git a/.husky/prepare-commit-msg b/.husky/prepare-commit-msg
index 617400a..e38252e 100755
--- a/.husky/prepare-commit-msg
+++ b/.husky/prepare-commit-msg
@@ -1,8 +1,5 @@
 #!/bin/sh
 
-# shellcheck source=./_/husky.sh
-. "$(dirname "$0")/_/husky.sh"
-
 if ! git config --get tf-a.disableCommitizen > /dev/null; then
     "$(dirname "$0")/prepare-commit-msg.cz" "$@"
 fi